# Order of Operations by 0wX83Ug

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```									 1-4 Order of Operations
1-4 Order of Operations

Warm Up
Problem of the Day
Lesson Presentation

Course
Course 1 1
1-4 Order of Operations

Warm Up
Perform the operations in order from
left to right.
1.     8+4–2        10
2.     93+1        28
3.     7–3+5        9
4.     20 ÷ 4 + 6   11

Course 1
1-4 Order of Operations

Problem of the Day
0123456789=1
Put the appropriate plus or minus signs
between the numbers so that the total
equals 1.
0 + 1 – 23 + 45 + 67 – 89 = 1

Course 1
1-4 Order of Operations

Learn to use the order of operations.

Course 1
1-4 Order of Operations

Vocabulary
numerical expressions
evaluate
order of operations

Course 1
1-4 Order of Operations

A numerical expression is a mathematical
phrase that includes only numbers and operation
symbols.

Numerical
Expressions
4+8÷2        6 371 – 203 + 2 5,006  19

When you evaluate a numerical expression, you
find its value.

Course 1
1-4 Order of Operations

When an expression has more than one
operation, you must know which operation to do
first. To make sure that everyone gets the same
answer, we use the order of operations.

ORDER OF OPERATIONS
1. Perform operations in parentheses.
2. Find the values of numbers with exponents.
3. Multiply or divide from left to right as
ordered in the problem.
4. Add or subtract from left to right as ordered
in the problem.

Course 1
1-4 Order of Operations

Order of Operations (Hop Scotch)

Parenthesis
( )

Exponents

Whichever comes
Mulitplication                  first when you

Whichever comes
first when you
+                 -

Course 1
1-4 Order of Operations

Additional Example 1A: Using the Order of
Operations
Evaluate the expression.
15 – 10 ÷ 2

15 – 10 ÷ 2         There are no parentheses or
exponents.
15 –        5   Divide.

10       Subtract.

Course 1
1-4 Order of Operations

Additional Example 1B: Using the Order of
Operations
Evaluate the expression.

9 + (21 ÷ 7)  5
9 + (21 ÷ 7)  5
Perform operations within
9+     3    5     parentheses.

9+         15      Multiply.

Course 1
1-4 Order of Operations
Check It Out: Example 1A
Evaluate the expression.
12 – 6 ÷ 2
There are no parentheses or
12 – 6 ÷ 2
exponents.

12 –    3        Divide.

9            Subtract.

Course 1
1-4 Order of Operations
Check It Out: Example 1B
Evaluate the expression.

7 + (24 ÷ 6)  3

7 + (24 ÷ 6)  3
Perform operations within
7+43
parentheses.

7 + 12             Multiply.

Course 1
1-4 Order of Operations
Additional Example 2A: Using the Order of
Operations with Exponents
Evaluate the expression.

24 + 6  4

2 +64
4
There are no parentheses.

16 + 6  4          Find the value of the number
with the exponent.
16 + 24             Multiply.

Course 1
1-4 Order of Operations

Check It Out: Example 2A
Evaluate the expression.

42 + 3  7

42 + 3  7     There are no parentheses.

16 + 3  7     Find the value of the number
with the exponent.
16 + 21        Multiply.

Course 1
1-4 Order of Operations
Lesson Quiz

23
Evaluate each expression.
1. 15 + 4  2   39

2. (12 – 5)2 – 10   16

3. 3 + 9  2 – 5    49

4. 43 – 30 ÷ 2

Course 1

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